BOO & Continuous Action

[Dave Reed]

JM,
What "causuality"? The OBR rule lists two penalties when an improper batter completes his at bat:
1) the proper batter is out.
2) any runners who had advanced by reason of the improper batter's batted ball, or were forced to advance, are returned to their original base.

Those are the only two penalties. In OP1, R2 wasn't forced, and there was no batted ball. Therefore, by rule he does not return.

To all---
FED and NCAA both return all runners who advanced after the improper batter had completed his time at bat. So in OP1, the runner would return if the game is played under NCAA or FED rules. OBR is different.